* {
    padding: 0;
    margin: 0;
}
/* 确认版心 */
.w {
    width: 1200px;
    margin: auto;
} 
body {
    background-color: #f3f5f7;
    height: 3000px;
}
li {
    list-style: none;
}
a {
    text-decoration: none;
}
.header {
    height: 42px;
    margin: 30px auto;
}
.logo {
    float: left;
    width: 200px;
    height: 42px;

}
.nav {
    float: left;
    margin-left: 60px;
}
.nav ul li {
    float: left;
    margin: 0 15px;
}
.nav ul li a {
    display: block;
    height: 42px;
    padding: 0 10px;
    line-height: 42px;
    font-size: 18px;
    color: black;
}
.nav ul li a:hover {
    border-bottom: 2px solid #00a4ff;
    color: #00a4ff;
}
.search {
    float: left;
    width: 412px;
    height: 42px;
    background-color: skyblue;
    margin-left: 70px;
}
.search input {
    float: left;
    width: 345px;
    height: 40px;
    border: 1px solid #00a4ff;
    color: #bfbfbf;
    font-size: 14px;
    padding-left: 15px;
}
.search button {
    float: left;
    width: 50px;
    height: 42px;
    border: 0;
    background: url(images/fa-search.png);
}
.user {
    float: right;
    line-height: 42px;
    margin-right: 40px;
    font-size: 14px;
}
.banner {
    height: 420px;
    background-color: #1c036c;
}
.banner .w {
    height: 420px;
    background : url(images/banner2.png) no-repeat top center;
}
.subnav {
    float: left;
    width: 190px;
    height: 420px;
    background-color: rgba(0, 0, 0, 0.3);
}
.subnav ul li {
    height: 45px;
    line-height: 45px;
    padding: 0 20px;
}
.subnav ul li a {
    font-size: 14px;
    color: #fff;
 }
.subnav ul li a span {
    float: right;
}
.subnav ul li a:hover {
    color: #00a4ff;
}
.course {
    float: right;
    width: 230px;
    height: 300px;
    background-color: #fff;
    margin-top: 50px;
}
.course h2 {
    height: 48px;
    background-color: #9bceea;
    text-align: center;
    line-height: 48px;
    font-size: 18px;
    color: #fff;
}
.course .bd {
    padding: 0 20px;

}
.course .bd ul li {
    padding: 14px 0;
    border-bottom: 1px solid #ccc;
}
.bd yl li h4 {
    font-size: 16px;
    color: #4e4e4e;
}
.bd ul li p {
    font-size: 12px;
    color: #a5a5a5;
}
.bd .more {
    display: block;
    height: 38px;
    border: 1px solid #00a4ff;
    margin-top:  5px;
    text-align: center;
    line-height: 38px;
    color: #00a4ff;
    font-size: 16px;
    font-weight: 700;
}

.good {
    height: 60px;
    background-color: #fff;
    margin-top: 10px;
    box-shadow: 0 2px 3px 3px rgba(0, 0, 0, 0.1);
    line-height: 60px;
}
.good h3 {
    float: left;
    padding-left: 30px;
    font-size: 16px;
    color: #00a4ff;
}
.good ul {
    float: left;
    padding-left: 30px;
}
.good ul li {
    float: left;
}
.good ul li a {
    padding: 0 30px;
    font-size: 16px;
    color: #050505;
    border-left: 1px solid #ccc;
}
.good .mod {
    float: right;
    padding-right: 30px;
    font-size: 14px;
    color: #00a4ff;
}

.box {
    margin-top: 30px;
}
.box-hd {
    height: 45px;
}
.box-hd h3 {
    float: left;
    font-size: 20px;
    color: #494949;
}
.box-hd a {
    float: right;
    font-size: 12px;
    color: #a5a5a5;
    margin-top: 10px;
    margin-right: 30px;
}
.box-bd ul {
    width: 1225px;
    overflow: hidden;
}
.box-bd ul li {
    float: left;
    width: 228px;
    height: 270px;
    background-color: #fff;
    margin-right: 15px;
    margin-bottom: 15px;

}
.box-bd ul li img {
    width: 100%;
}
.box-bd ul li h4 {
    margin: 20px 20px 20px 25px;
    font-size: 14px;
    color: #050505;
    font-weight: 400;
}
.box-bd ul li .info {
    margin: 0 20px 0 25px;
    font-size: 12px;
    color: #999;
}
.box-bd .info span {
     color: #ff7c2d;
}
.box2 {
    margin-top: 30px;
    height: 200px;
    background-color: pink;
}
.box2-hd {
    height: 45px;
} 
.box2-hd h3 {
    float: left;
    font-size: 20px;
    color: #494949;
}
.box2-hd ul {
    float: left;
    margin-left: 330px;
}
.box2-hd ul li {
    float: left;
    padding: 0 20px;

}
.box2-hd ul li a {

}
.box2-hd a {
    float: right;
    font-size: 12px;
    color: #a5a5a5;
    margin-top: 10px;
    margin-right: 30px;
}
